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Flight Reliability

DL 1524 · Delta Air Lines

St. Louis → Atlanta (STL–ATL)

93
Nerd Approved
WanderNerd Reliability Score
94%
Arrive within 15 minutes
7 min early
Average arrival delay
1.6%
Cancelled
14 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

DL 1524 arrived on time 100% of the time on Fridays. On Mondays: 88%.

Better than the STL–ATL route average.

DL 1524 arrived on time 94% of the time, versus 86% across the STL–ATL route.

Better than the Delta Air Lines network average.

DL 1524 arrived on time 94% of the time, versus 81% across the Delta Air Lines network.

Recent months have been rougher.

DL 1524 arrived on time 88% of the time over the last three months in the data, compared with 98% in the three months before that.

The breakdown

On-time by weekday
  • Mon88%(50 flights)
  • Tue94%(50 flights)
  • Wed96%(52 flights)
  • Thu92%(52 flights)
  • Fri100%(52 flights)
  • Sat92%(50 flights)
  • Sun94%(51 flights)
On-time by departure window
  • 3–6 AM—(3 flights)
  • 6–9 AM94%(354 flights)
On-time trend by month
81%
May

Jun 86% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202590%31
August 2025100%31
September 202597%30
October 2025100%31
November 202596%28
December 2025100%30
January 202693%29
February 2026100%28
March 202693%29
April 202690%30
May 202681%31
Departures on time
94%
Diverted
0.5%
Flights flown
357
Months covered
12

Same route, other flights

Keep nerding

Based on 365 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.